<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>页面未找到 - 公众号排版工具</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .container {
            text-align: center;
            background: rgba(255, 255, 255, 0.95);
            padding: 50px;
            border-radius: 20px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            backdrop-filter: blur(10px);
            max-width: 600px;
        }

        h1 {
            font-size: 3em;
            color: #2C3E50;
            margin-bottom: 20px;
            font-weight: 300;
        }

        p {
            font-size: 1.2em;
            color: #7f8c8d;
            margin-bottom: 30px;
            line-height: 1.6;
        }

        .home-btn {
            display: inline-block;
            padding: 15px 30px;
            background: linear-gradient(135deg, #0081FF 0%, #00BFFF 100%);
            color: white;
            text-decoration: none;
            border-radius: 8px;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .home-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 129, 255, 0.3);
        }

        @media (max-width: 768px) {
            .container {
                padding: 30px;
            }
            
            h1 {
                font-size: 2em;
            }
            
            p {
                font-size: 1em;
            }
        }
    </style>
</head>
<body>
    <div class="container">
        <h1>404</h1>
        <p>抱歉，您访问的页面不存在。</p>
        <p>可能的原因：</p>
        <ul style="list-style: none; margin: 20px 0;">
            <li>• URL地址输入错误</li>
            <li>• 页面已被移除或重命名</li>
            <li>• 链接已过期</li>
        </ul>
        <a href="index.html" class="home-btn">返回首页</a>
    </div>
</body>
</html>